Machinist s gauge



, Sept. 30, 194.7. Q K'ONINGV Re. 22,921

MACHINISTS GAUGE Original Filed Nov. 22, 1944 WE/WOR.- Gera/d Komt/:(7.

'Reissued Sept. 30, 1947 Gerald Koning, Muskegon, Mich., assigner-to ThefL. S. :Starrett Company, Athol, Mass.

Original No. 2,397,492, dated VApril 2, 1946-, `Serial No. 564,625,November 22, 1944.

Application -for reissue October 16, 1946, Serial No. 703,456

8 Claims. `1 This invention appertains to improvements in fgauges forthe use of 'emachinists'in shop practice, aand has 4for one of .itsseveral objects to provide a type 'thereof 'for the :precisionmeasurement of heights on planer's, `Shapers, land like machines,4a-ndfor similar purposes; the gauge :being a combination of spiritlevel :mounted in an opening in a lright-angle triangular :block lorframe and a `slidable gauge head that isadapted to be adjustably4clamped in set position on the slotted hypothenuse 'surface of theblock or frame,

Another object of the invention has to do with the :provision of a gaugeof ,this kind, which embodies certain refinements in its features of ad-`iustment, the same being designed to allow the gauge head to be setquickly at a roughly approximated position and thereafter adj-usted with,precision to a final setting and secured against accidentaldisplacement from such final setting; .the general funct-ions of thistype of gauge are ffully set forth in the U. S. Patent No. 1,202,114,.to Leroy S. Starrett, .and are therefore Well understood through theuse of various modified for-ms in the trade.

With these and other objects and advantages in View, the inventionresides in the certain new and useful combi-nation, construction, andarrange-ment of parts, as Will be hereinafter more fully described, setforth in the appended claims, and illustrated in the accompanyingdrawing, in which:

Figure l is a side elevation of the improve@q gauge, in accordance withthe invention; a ,portion of the upper inclined side of the block orframe being broken away to show .the slotted hyapothenuse `surfacethereof and the clamp means for securing the sliding head in a positionof adjustment thereon;

Figure 2 is a vertical transverse section, taken through the line 2--2on Figure 1; and

Figure 3 is a fragmentary sectional View, taken on the line 3-3 ofFigure 1, looking in the direction of the arrows.

Referring to the drawing in detail, the improved gauge, as it isexemplified therein, is comprised in La triangular frame I8 having acentral web I2 with an opening I4 in which a spirit level I6 ispositioned to indicate the true horizontal position of the lower sideIll', or the true vertical position of the side I, of the frame I0. Theinclined side I0a is formed to provide a T-slot I8 in which a clampplate 28 is guided. The surface of the inclined side Illa islongitudinally channeled, as at 22, with the opposite sides of thechannel dverging upwardly from a slot 24 opening into the upper side ofthe T-slot I 8.

Positioned on the inclined side Illa, of the frame I0, is a slidablegauge head 26 which has its base surface shaped to conform to that ofthe channel .22 for its stable support therein. The

:gauge head 26 has an opening through the same,

32 passes upwardly from the opening 38 through a second clamp plate 38and into the opening 28, where it is provided with a knurled head 34 anda knurled lock nut 36. 'The slide plate 38 rests upon the lower inclinedside of the opening 28 Vand is provided with `an Aupturned -end 46,which sis engaged -in an annular groove 44 formed in va knurledadjusting -nut 42 engaged on the headless bolt 46 that is screw threadedinto the near end wall of the opening 28. A shoulder 48 is offset fromlthe lower end of :the longer vertical side of the gauge head v 26 .andis, together with the top :horizontal side of the latter, provided withscrew threaded openings 58 and 52, respectively; a like opening 54 beingalso formed in the longer vertical side,l at ,a point above the positionof the headless bolt 46 therein. These tapped openings 15.8, 52, .andl54.are provided to interchangeably receive measuring posts (not shown)of varying lengths to correspondingly vary the measuring .range of thegauge, as is well understood by those skilled in general machine shoppractices.

In the use of `the gauge, as it is thus constituted, the gauge .head 26is to be quickly moved relatively to the triangular frame I8 to aroughly approximated setting thereon, upon the loosening up of the clampplates `20 and l38, and a spring washer 33 lbearing on the vclamp plate38 by a proper manipulation of the clamp screw 32 from the knurled vhead34 and the lock nut 36. The gauge head 26 will be secured in thisapproximated position, sufficiently to prevent accidental displacementduring further handling, by the down turning of the clamp screw 32which, when its lower end contacts the bottom of the groove I8, forcesthe clamp plate 26 upwardly against the upper -walls of the cross-slotof the latter. When thus positioned and lightly secured, .thejgauge head26 will be slowly and accurately adjusted toits final setting by aproper Inanipulation of the knurled nut 42 on the bolt 46. Here, thegauge head 26 will be rigidly secured by a tightening of the lock nut 36downwardly against the spring washer 38 and the clamp plate 38,`in whichmovement of the lock nut the spring washer is placed under a tensionwhich acts to `exert a lift on the 'clamp screW 32, forcing the clampplate 2|) into a more secure clamping engagement'with the upper walls ofthe cross-slot of the groove I8.

Having thus fully described my invention, it is to be understood thatany and all changes in the construction and arrangement of parts, towhich the disclosed embodiment thereof is susceptible,

may be resorted to, without departing from the spirit ofthe invention orits scope as claimed.

What I claim is:

1. A machinists gauge, including a triangular frame having base surfacesat right angles to each other and a hypothenuse surface provided with aT-slot coextensive therewith, a gauge head slidably mounted on saidhypothenuse surface and having a side opening, a clamp screw carried bysaid gauge head and projecting therefrom into said T-slot and said sideopening, a clamp plate carried by said clamp screw within said T-slot, asecond clamp plate positioned within said side opening and engaged onsaid clamp screw, a spring washer engaged on said clamp screw andbearing on' said second clamp plate, a bolt carried by said gauge headand projecting into said side opening in right angular relation to saidclamp screw, a knurled nut carried by said bolt and engaged with saidsecond clampA plate to impart precision adjustment to said gauge head,and a lock nut carried on said clamp screw and adapted to be tightenedagainst said spring washer to secure the gauge head in adjusted positionbetween said clamp plates.

-2. The invention as in claim 1, with said second clamp plate providedwith an upturned end portion which is engaged in an annular grooveformed in the said knurled nut.

3. A gauge comprising a base having an inclined upper face, said basehaving therein a T-slot extending contiguously to said upper face andopening through the latter, a gauge head including a bottom portionslidably seated upon said inclined face and having an elongated slottherein, a plate seated upon said bottom portion of said gauge head,screw means extending through said plate and said elongated slot, meansin said T-slot engageable with walls defining the top of the latter andwith which said screw means is cooperable initially to clamp said platelightly against said gauge head and the latter lightly against theinclined face of said base to secure said gauge head initially in aposition of rough adjustment along said inclined face and also to securesaid plate against movement longitudinally relative to said base, andmeans connected to and reactable from said plate to effect a finalprecise adjustment of said gauge head along said inclined face, saidscrew means being operable following said precise adjustment to clampsaid gauge head tightly against said inclined face.

4. A gauge comprising a base having an inclined upper face, a gauge headseated upon said inclined face for sliding adjustments therealong, aplate seated upon said gauge head, means for initially clamping saidplate lightly against said gauge head and the latter lightly againstsaid inclined face to secure said gauge head initially in a position ofrough adjustment along said inclined face and also to secure said plateagainst movement longitudinally relative to said base, and meansconnected between said plate and said gauge head reactable from theformer to eiiect a :final precise adjustment of the latter along saidinclined face, said clamping means being operable following said finalprecise adjustment to clamp said plate firmly against said gauge headand the latter firmly against said inclined face.

5. A gauge as set forth in claim 4, said means for initially clampingincluding screw means for clamping the plate against the gauge head andthe latter against` the inclined face of the base.

6. A gauge as set forth in claim 4, said means for effecting a nalprecise adjustment including screw means connected between the plate andthe gauge head reactable from the former to adjust the latter along theinclined face of the base.

7. A gauge comprising a base having an inclined upper face, a gauge headseated upon said inclined face for sliding adjustments therealong andhaving therein an elongated slot, a plate seated upon said gauge head,screw means extending through said plate and said slot and cooperatingwith said plate, gauge head and base to hold said plate seated upon saidgauge head and the latter seated upon said inclined face, said screwmeans being adjustable longitudinally relative to said inclined face andbeing secureable relative to said base in any such adjusted position andwhen secured serving to hold said plate against longitudinal movementrelative to said inclined face, and a connection between said plate andsaid gauge head reactable from the former to adjust the latterlongitudinally relative to said inclined face, said screw means beingeiective to clamp said plate against said gauge head and the latteragainst said inclined face to maintain said gauge head in adjustedposition relative to said inclined face.

8. A gauge comprising a base having an inclined upper face, said basehaving therein a T-slot extending contiguously to said upper face andopening through the latter, a gauge head including a bottom portionseated upon said inclined face for adjustment therealong and having anelongated slottherein, a plate in said T-slot engageable with Lwallsdefining the top of the latter, a second plate seated upon the bottomportion of said gauge head, a screw extending through said second plateand said elongated slot and through and having threaded engagement withsaidfirst mentioned plate and en gageable at its bottom with the walldefining the bottom of said T-slot to urge said first mentioned plateupwardly into clamping engagement with the walls defining the top ofsaid T-slot and thus secure said screw against movement along saidT-slot and thereby secure said second mentioned plate against movementrelative to said base, screw means between said second mentioned plateand said gauge head reactable from the former to adjust the latter alongsaid inclined face, and a nut threaded on said screw for cooperationwith said second mentioned plate to clamp the latter against the bottomportion of said gauge head and to clamp said gauge head against saidinclined face.

GERALD KONING.

REFERENCES CITED rlhe following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number v Name Date 875,050 Conlon Dec. 31, 19071,202,114 Starrett Oct. 24, 1916 2,242,116 Donaway May 13, 1941

